Washing machines for ground mount solar PV photovoltaic panels, carports, roof mount solar, ballasted solar and heliostats. Wash speed of up to 80 ft (25 meters) per minute. 4 brush sizes from 6 ft to 13 ft 8 in (180 to 420 cm). One operator can wash effortlessly 2MW of solar panels per 8 hour shift. Latest generation ultrasonic sensors for automatic brush proximity control. Extremely low water consumption.